From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: mttcg@greensocs.com, QEMU Developers <qemu-devel@nongnu.org>,
Frederic Konrad <fred.konrad@greensocs.com>
Subject: Re: [Qemu-devel] [PATCH 11/10] tcg: comment on which functions have to be called with tb_lock held
Date: Thu, 13 Aug 2015 18:20:37 +0200 [thread overview]
Message-ID: <55CCC3D5.9020706@redhat.com> (raw)
In-Reply-To: <CAFEAcA9aaYvjRWmRqMEjDq4_1XEfHvyQkSVv-itbWT9U7nNDHg@mail.gmail.com>
On 13/08/2015 17:32, Peter Maydell wrote:
>> > TBs are physically-tagged so invalidates are not too frequent unless the
>> > guest does self-modifying code or swaps. They shouldn't be a source of
>> > tb_lock contention except if you do SMC (not just dynamic recompilation:
>> > really self-modifying code).
> Do guests with writeable data and code in the same page also
> get treated as SMC for these purposes? (That's more common
> than real SMC.)
Not after a short while, when the code_bitmap kicks in.
Paolo
next prev parent reply other threads:[~2015-08-13 16:20 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-12 16:40 [Qemu-devel] [PATCH 00/10] translate-all.c thread-safety Paolo Bonzini
2015-08-12 16:40 ` [Qemu-devel] [PATCH 01/10] cpus: protect work list with work_mutex Paolo Bonzini
2015-08-28 14:33 ` Peter Maydell
2015-08-12 16:40 ` [Qemu-devel] [PATCH 02/10] cpus: remove tcg_halt_cond global variable Paolo Bonzini
2015-08-13 13:05 ` Frederic Konrad
2015-08-13 13:08 ` Paolo Bonzini
2015-08-13 13:19 ` Frederic Konrad
2015-08-28 14:36 ` Peter Maydell
2015-08-29 6:52 ` Paolo Bonzini
2015-08-12 16:40 ` [Qemu-devel] [PATCH 03/10] replace spinlock by QemuMutex Paolo Bonzini
2015-08-13 12:17 ` Frederic Konrad
2015-08-13 13:12 ` Paolo Bonzini
2015-08-13 13:21 ` Frederic Konrad
2015-08-28 14:49 ` Peter Maydell
2015-08-28 14:53 ` Frederic Konrad
2015-08-29 6:51 ` Paolo Bonzini
2015-08-12 16:40 ` [Qemu-devel] [PATCH 04/10] exec-all: remove non-TCG stuff from exec-all.h header Paolo Bonzini
2015-08-28 14:53 ` Peter Maydell
2015-08-29 6:55 ` Paolo Bonzini
2015-08-12 16:40 ` [Qemu-devel] [PATCH 05/10] cpu-exec: elide more icount code if CONFIG_USER_ONLY Paolo Bonzini
2015-08-13 13:14 ` Frederic Konrad
2015-08-13 14:06 ` Paolo Bonzini
2015-08-28 14:56 ` Peter Maydell
2015-08-29 7:07 ` Paolo Bonzini
2015-08-12 16:40 ` [Qemu-devel] [PATCH 06/10] tcg: code_bitmap is not used by user-mode emulation Paolo Bonzini
2015-08-28 14:57 ` Peter Maydell
2015-08-29 7:13 ` Paolo Bonzini
2015-08-12 16:40 ` [Qemu-devel] [PATCH 07/10] tcg: comment on which functions have to be called with mmap_lock held Paolo Bonzini
2015-08-28 15:33 ` Peter Maydell
2015-08-29 6:57 ` Paolo Bonzini
2015-08-12 16:41 ` [Qemu-devel] [PATCH 08/10] tcg: add memory barriers in page_find_alloc accesses Paolo Bonzini
2015-08-12 20:37 ` Emilio G. Cota
2015-08-13 8:13 ` Paolo Bonzini
2015-08-13 19:50 ` Emilio G. Cota
2015-08-28 15:40 ` Peter Maydell
2015-08-29 6:58 ` Paolo Bonzini
2015-08-12 16:41 ` [Qemu-devel] [PATCH 09/10] exec: make mmap_lock/mmap_unlock globally available Paolo Bonzini
2015-08-28 15:42 ` Peter Maydell
2015-08-12 16:41 ` [Qemu-devel] [PATCH 10/10] cpu-exec: fix lock hierarchy for user-mode emulation Paolo Bonzini
2015-08-28 15:59 ` Peter Maydell
2015-08-12 16:41 ` [Qemu-devel] [PATCH 11/10] tcg: comment on which functions have to be called with tb_lock held Paolo Bonzini
2015-08-13 12:51 ` Frederic Konrad
2015-08-13 12:59 ` Paolo Bonzini
2015-08-13 13:32 ` Frederic Konrad
2015-08-13 14:39 ` Paolo Bonzini
2015-08-13 15:32 ` Peter Maydell
2015-08-13 16:20 ` Paolo Bonzini [this message]
2015-08-12 16:41 ` [Qemu-devel] [PATCH 12/10] tcg: protect TBContext with tb_lock Paolo Bonzini
2015-08-13 12:57 ` Frederic Konrad
2015-08-13 13:01 ` Paolo Bonzini
2015-08-13 13:04 ` Frederic Konrad
2015-08-14 9:26 ` [Qemu-devel] [PATCH 00/10] translate-all.c thread-safety Frederic Konrad
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